Your browser doesn't support javascript.
loading
Increased electrical output when a bacterial ABTS oxidizer is used in a microbial fuel cell.
Hunter, William J; Manter, Daniel K.
Afiliação
  • Hunter WJ; USDA-ARS, Fort Collins, CO, 80526-8119, USA. william.hunter@ars.usda.gov
Curr Microbiol ; 62(2): 633-8, 2011 Feb.
Article em En | MEDLINE | ID: mdl-20853166
Microbial fuel cells (MFCs) are a technology that provides electrical energy from the microbial oxidation of organic compounds. Most MFCs use oxygen as the oxidant in the cathode chamber. This study examined the formation in culture of an unidentified bacterial oxidant and investigated the performance of this oxidant in a two-chambered MFC with a proton exchange membrane and an uncoated carbon cathode. DNA, FAME profile and characterization studies identified the microorganism that produced the oxidant as Burkholderia cenocepacia. The oxidant was produced by log phase cells, oxidized the dye 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS), had a mass below 1 kD, was heat stable (121°C) and was soluble in ethanol. In a MFC with a 1000 Ω load and ABTS as a mediator, the oxidizer increased cell voltage 11 times higher than atmospheric oxygen and 2.9 times higher than that observed with ferricyanide in the cathode chamber. No increase in cell voltage was observed when no mediator was present. Organisms that produce and release oxidizers into the media may prove useful as bio-cathodes by improving the electrical output of MFCs.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Ácidos Sulfônicos / Fontes de Energia Bioelétrica / Oxidantes / Eletricidade / Benzotiazóis / Burkholderia cenocepacia Idioma: En Ano de publicação: 2011 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Ácidos Sulfônicos / Fontes de Energia Bioelétrica / Oxidantes / Eletricidade / Benzotiazóis / Burkholderia cenocepacia Idioma: En Ano de publicação: 2011 Tipo de documento: Article